A great Silent Voice fanfic idea could be a time - skip story. Imagine what the characters' lives are like years after the events of the movie. Have Shoya and Shoko stayed together? What about their careers? Maybe Shoya has become a sign language teacher, and Shoko is an artist. Or perhaps write a fanfic where a new character enters their lives, someone who doesn't know about their past but slowly uncovers it and helps them heal old wounds in new ways. You could also do a fanfic that's centered around the school events but with a magical twist, like a magical object that helps Shoko communicate more easily and changes the dynamics between the characters.
A fanfic could center around a trip they take together. They could go to a beautiful beach. Shouko would be excited to see the ocean for the first time, and Shouya would be there to make sure she has a great time. They might build sandcastles and collect seashells, and this simple trip could strengthen their relationship even more.
There could be a new friendship formed between characters that wasn't in the original. Maybe a character overcomes a major fear or achieves a personal goal.
A plot could involve the characters from Persona 5 visiting the world of A Silent Voice. They might use their Personas to help the characters in A Silent Voice deal with their inner traumas. For example, Joker could use Arsene to communicate with Shoya's inner self, helping him to fully come to terms with his past actions and forgive himself even more deeply. And the Persona 5 characters could also learn about the power of non - verbal communication from the A Silent Voice characters.
A crossover with a time - travel anime. Shoya could travel back in time to change the events that led to him bullying Shoko in the first place. This would involve a lot of self - reflection on his part as he tries to rewrite history and make things right. It could also show how small changes in the past can have a big impact on the future relationships between all the characters in 'A Silent Voice'.
One interesting crossover could be having a character from 'A Silent Voice' enter the world of MLP. Maybe Shoya could befriend Twilight Sparkle and learn about friendship in a whole new way. The contrast between the real - world setting of 'A Silent Voice' and the magical world of MLP could create unique storylines.
Redemption is a common theme. Given the nature of the original story, many fanfics explore how characters continue to seek redemption for their past actions. For example, Shoya's journey of making up for his bullying past.
It could add a whole new layer of complexity and empathy to the story. Maybe it would change how he interacts with others and how they perceive him.
Maybe the deaf character has a dream, like becoming a dancer. Shouya supports the dream and they start training together. However, they face many setbacks because of the deaf character's disability. But with Shouya's determination and the deaf character's passion, they find ways to work around the problems. This could be a story about chasing dreams against all odds.
A cool Silent Hill fanfiction idea is to focus on the psychological aspect more deeply. Maybe write about a psychologist who visits Silent Hill to study the mental states of the people there. He gets trapped and starts to experience hallucinations related to his own past traumas. Also, a fanfiction where the monsters in Silent Hill are given a chance at redemption. What if they could be cured of their 'evil'? It would be an interesting take on the usual horror theme.
You could write about an oc who is a survivor from a previous encounter in Silent Hill but has to return for some reason. Maybe they left something behind that is important to them and they face new terrors on their return journey.